Process of making containers



May 21, 1929. R. L. PARISH PROCESS OF MAKING CONTAINERS Filed May 2 1928Patented May 21, 1929..

I "1,713,675- PATENT OFFICE.

RICHARD L. PARISH, OF CHICAGO, ILLINOIS, ASSIGNOB TO AMERICAN FLANGE 8::MANUFACTURING 00., OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

PROCESS OF MAKING CONTAINERS.

Application filed May 28,

My invention relates to a method of making containers and to thecontainers themselves which employ walls madeof metallic sheet materialcurled into cylindrical or 6 curved shape, such containers also usuallyhaving sheet metal end walls, though the invention is not to be limitedthereto.

It has hitherto been the practlce to abut the ends of the metallic sheetwhich is curled to form a cylindrical or curved contalner wall and toweld such abutting ends together. In carrying out inventlon, I join theengaging ends of such a curled sheet by forming these ends withinterleavlng or R inter-meshing continuatlons. ThlS construction is notin itself leak -;proof wherefore I make it leak proof by providing abodyor lining of sealing material-{between such 1nterleavingcontinuations. Thisl- -sealmg ma- 0v terial is preferably initiallyliquid and is applied before the joint between the edge portions of themetallic sheet s completed. During the process of completing the oint,the body of sealing material is squeezed and forced to flow into and tofill the crevices through which leakage would other- Wise occur.

The invention will be more fully explained by reference to theaccompanying W drawing in which Fig. 1 is a perspectlve viewillustrating a drum or barrel made in accordance with the preferredembodiment of the invention; Fig. 2 is a perspective view of a portionof the drum at one stage in the construction thereof, the joint betweenthe adjacent edge portions of the curled metallic sheet being onlypartially formed and the body of sealing material being located in aposition from which it is spread when an the joint is completed; Fig. 3is a view similar to Fig. 2 illustrating the joint completed; and Fig.4is a sectional view on line 4-4 of Fig. 1, on a larger scale.

The container illustrated is in the form of a barrel or drum of the kindwhich is commonly used for packaging oil. This container is composed ofthree sheet metal portions 1, 2 and 3. The sheet metal portion 1 iscurled into a generally cylindrical shape,

to the meeting edge portions of the sheet being margined by jointforming continuations 4 and 5. These continuations extend lengthwise ofthe barrel or drum and terminate at the barrel ends. The continuation 4is returned to lap the wall and is spaced 1928. Serial No. 281,275.

apart from the wall so that it, together with the adjacent portion ofthe wall, is U- shaped in cross section. The continuation 5 is continuedbeyond the wall portion from which 1t springs and is 'U-shaped in crosssection to snugly receive the joint forming cont nuation 4, theterminating part of the continuation 5 being next the curved wall of thebarrel and being snugly received between the continuation 4 and thebarrel. During the process of manufacture the portions 4 and 5 areinitially radially disposed, the portion 5 being so much wider than theportion 4 as to fully embrace it when the formation of the joint iscompleted as indicated in Figs. 3 and 4.

In the stage of construction illustrated in Fig. 2, the longitudinaledge of the continuation 4 and the adjacent portion of the face of thecontinuation 5 that is inwardly beyond the continuation 4 form a pocketinto which sealing material 6 is squirted, this sealing material beinginitially liquid and of such a nature as to become sufiiciently hard tobe held in place shortly after it is applied. According to one formula,the material of which the sealing material is made may be inclusive ofthe following, by weight:

Per cent.

Ceylon crepe rubber 46.6 Precipitated calcium carbonate 46.6 Zinc oxidepowder Sulphur Tetra methyl thiuram disulphide .3

A quantity of benzol e ualin the a regate weight of the abri veingredieirs is added thereto. The sealing material is initially liquidand is squirted upon the parts 4 and 5 to form a unitary structuretherewith. During the step which-is taken to complete the joint from thestage shown in Fig. 2 to the final stage shown in Figs. 3 and 4, thebody of sealing material 6 is caused forcibly to flow into all of thecrevices and spaces which intervene between the contmuations 4 and 5 ofthe-edge portions of the curved wall of the barrel, there being anexcessive quantit of sealing material to insure this result. s aconsequence, a leak proof joint is established between the meetmg edgeportions of the curved wall of the barrel, th1s joint being permanentand sufiino ciently-flexible by reason of the sealin material whichremains in a sufiicientlg condition to maintain the leak proo c aracterof the joint even though there may be slight relative movements of the.parts composing the joint thatmay arise during shipment and handling, aresult which is not assured where the meeting edges -of the curved wallare butt'weldedto ether. The curved wall of the barrel may e formed withthe usualrolling hoops 7 and may be provided with flaring cirfiularcontinuations8 which may be 'oined with the end walls 2 and 3 in accorance with common practice. Wh re the flaring continuations 8 are employethe meeting edges thereof at 9 may be effectively butt welded. By way ofrecapitulation, it will be observed that I have employed a method offorming curved container walls which consists in curling a sheet ofmetal to bring opposed edges thereof in meeting relation, formingcontinuations upon the meetin edge portions of such container wall whichinitially extend inwardly and are side by side and which extend alongsuch meeting edges from end to end of the container, one of thesecontinuations being sufiiciently wider than the other to be formed intoU-shape in cross section whenecurled over the other, placing a body ofsealing material upon the wider of said two continuations and at theinner longiastic miners tudinal edge of the other continuation, curlingthe wider the two continuations over the other, and curling bothcontinuations close to the container wall and squeezing the sealingmaterial into the spacing between and extending along the continuations.

Having thus described my invention, I claim:

The process of forming curved container walls which consists in curlinga sheet of metal to bring opposed edges thereof into relation; formingcontinuations i the other; and curling both continuations close to thecontainer wall and squeezing the sealing material: into the spacingbetween and. extending along the continuations.

In witness whereof, I hereunto subscribe my name.

RICHARD L. PARISH.

